Pictured here is a sign located in the Finnish metro system, in the Matinkylä station, depicting a fairly standard "do not feed the birds" sign. We have the silhouette of a generic pigeon with the red slashed circle on top of it meaning "no". The three text versions in Finnish, Swedish and English are roughly similar in address, though the Finnish and Swedish are more in a passive voice of "it is forbidden to feed birds" compared to the English version which gives a command.
The reason this caught my attention was the location! This is quite deep underground, and it is not usual to run into birds underground. The entrances and the metro tunnels are literally cavernous and contain some food from people dropping their snacks, so it is natural for birds to appear in the role of pests. But I was nevertheless amused of this.